Bythotrephes longimanus longimanus Leydig, 1860

Korovchinsky, Nikolai M., 2023, Unexpected high species richness of Bythotrephes Leydig, 1860 (Branchiopoda: Cladocera: Cercopagididae) in subalpine Austrian lakes, with the description of new taxa, Zootaxa 5264 (1), pp. 77-93 : 84

Bythotrephes longimanus longimanus Leydig, 1860

The detailed redescription of the taxon with the designation of a neotype has been done by Korovchinsky (2015).

The specimens of nominotypical subspecies have generally larger body size (up to 3.06 mm) but their most pronounced diagnostic difference is the presence of large, directed more or less down, claws of postabdomen (6.6– 14.0% of body length) and caudal process (6.0–15% of body length) ( Table 2 ).

Geographical distribution. Deep subalpine lakes of Switzerland, Southern Germany, and Northern Italy. The occurrence of the taxon in Great Britain requires further confirmation.